What's the problem? No Blue Dot in the Indexmenu ←- An Alternative way from the URL.
Dokuwiki Indexmenu Plugin sorts all the pages which have child pages before those which don't. This is solved by adding a blank child page to each page which had no child pages.
How to add a child page
Alternative way to add a child page Double the page title when you make the first page creating link.
[[opencpn:opencpn_user_manual:[namespace1]:title_of_page:title_of_page|Title of the Page]]
Note: There are some pages (or namespaces) whose child pages have no child pages of their own. They appear in the proper order in the sidebar. Should we create child pages for them anyway to preserve the sort order in case someone later adds another child page or should we wait until that happens and add the necessary blank pages to restore the sort order? If a later editor adds a child page this scheme for preserving the sort order may have been forgotten. On the other hand, many of the pages may never have a child page, making a lot of blank pages just unnecessary overhead.